Metalworking machine



Aug 31, 1937- J. M. cHRls'rMAN METALWORKING MACHINE Filed Sept. 19, 193'- Bhf.

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y1() adjusted so that a bending device and a wrinkle backed off so that the strip can be removed from 10 A-15 a machine on which a U-shaped strip of metal 24, pivotally mounted on a bolt 25 secured to 15 20 table can be readily indexed to be cooperatively tion, The arm 26 terminates at one end in a 20 -25 with the drawing, which forms a part of this form there is arranged a follow bar 30 having a 25 ,30 partially broken away and 1n section to show the projecting portion of a form and secured by the 30 v 40 Such means consists of a table I4 resting on the that the base of the formed strip will be pressed 4,0

. 45 ed end 0f pivot pin I5. then the position of the table is shifted so that 45 metal. In the presenty instance, these forms I1 when there are two forms, I provide a pair of 50 ,u P5 These strips are fitted over the projecting faces ranged in alignment upon rotation of the table. 55

Patented Aug. 31, 1937 i UNITED STATES PATENT OFFICE 2,0913 49 METALWORKIVNG MACHINE John M. Chrstman, Detroit, Mich., assignor to Packard Motor Car Company, Detroit, Mich., a corporation of Michigan Application September 19, 1934, Serial No. 744,655

9 Claims. (Cl. 153-2) y This invention relates to metal working maof the forms and are secured thereto by clamps chines and more particularly to machines for as indicated at I9. rI'he table and the clamps bending and finishing formed metal strips. are formed with angular faces which-are com- An objectof the invention is to provide a plementary when the clamps are in position to 5 machine in which formed metal strips can be secure the strips. The clamps are also each readily bent and finished to smooth out bending formed with a slot 2I through which extends a wrinkles. stud 22 upon which a nut 23 is threaded to se- Another object of the invention is to provide cure the clamp in position. By means of this a machine in which a fixture can be readily slot, the clamp can be removed when the nut is smoothing device can be successively applied to the form without entirely unscrewing the nut.

operate upon formed metal strip material held Mounted on the base plate I3 is a device for thereby. bending the metal strips secured to the forms A further object of the invention is to provide by the clamps I9. Such device includes a plate can be bent longitudinally and then smoothed the base and the bed plate I3. An arm 2% is to remove wrinkles therein. welded to the plate 24 and forms therewith a A still further object of the invention is to lever which can be swung manually on the pivot provide a metalworking machine in which a work 25 by an operator to perform a bending operarelated with bending means or with ironing boss 21 on which are mounted rollers 28, the rollmeans. ers being held in position by studs 29 extending Other objects of the invention will appear from therethrough and engaging the boss. Between the following description taken in connection the rollers and the strip of material held on the specification, and in which: plane face 3| contacting with the rollers and a Fig. 1 is a plan view of a metal working magrooved face 32 into which the formed metal chine incorporating the invention; strips lie during bending.

i Fig. 2 is an end elevational view of the same After a strip is telescopically moved onto the straightening rollers in applied relation. clamp, I9, the table is rotated to a position where Referring now to the drawing by characters the recess in the follow bar can t over the strip of reference, I0 indicates the bed of a metal projecting beyond the end of the form whereupon working machine having supporting legs II. swinging movement of the bending devicel wi 35 Fixed on the bed are supporting base plates l2 cause the foiiow bar to travel around the curved 35 and I3. face portion of the form and bend the metal Rotatably mounted on the base plate I2 is strip thereagainst. The rollers maintain the iolmeans for supporting metal strip material durlow bar at right angles to the operatinglever and ing bending and ironing operations thereon. the design of the recess in the follow bar is such bed plate I2 and having a pivot pin I5, projectagainst the outer face of the form and the side ing from the bed plate, extending therethrough. flanges of the strip will be pressed against the The table is secured against axial displacement upper and lower faces of the form. When one by means 0f Ulli l5 engaging the upper 'llfeadend of the strip has been bent around the form,

011 01 mOIe OImS l1 are Xed t0 the Gable the same operation can be repeated on the other by means of bolts I8 and a portion oi such forms end of the strip,

extends beyond the table and is curved in the In order that the table can be fixed in the four shape in which it is desired to bend a strip of positions required for the four bending operations are preferably flat and rest directly on the table oppositely disposed holes 33 in the table and a. pair with their free faces projecting beyond the table of oppositely disposed holes 34 in the forms I1 shaped to take a strip of metal material formed The bed plate is provided with a hole 35 with angular in cross section preferably in U-shape. which any one of the holes 33 and 34 can be ar'- '70 62 is secured to the roller serted through to the bed.

5 grasped for application to or removed from the table.

The bent jacent the forms by clamping tion,

lever. When the straight face 43 of lies adjacent 'the lever, then the lever can .be

55 housing.

A pair of guide members 54 are fixed on the bed plate l0 and the housing is grooved at each side as indicated at 55 so that the end portions thereof overlie the guides. The roller housing 60 is reciprocated preferably by power means.

in a direction toward the table, the

the housing side plates *"75 are provided With upstanding portions 65 which serve as stop me unders The that they will roller segments he table during the bending operations When the ironing ompleted on the ends of a strip so bent and ironed is finished sol that further operation to pro quired.

skilled to be li e arrangement of the vide smooth surfaces is not rethe invention has been described in tion with a specific embodiment, thevprinciin the art.

niited only as indicated by the scope of the appended claims.

What I claim is:

l. In a metal working machine, the combination of a form on Whic 2. In a metal w tion with a Work comprising a reciproca orking machine, the combinaholder, of an ironing device ble housin a Work ironof channel shaped metal, sald form having a straight portion over which the channel shaped metal fits and a curved portion over Which a portion of the metal strip is to be bent, and means for clamping the length of metal against the straight portion of said form, said bending device cooperating With the form to bend the portion of the form, and the rollers of said smoothing device cooperating with the form to press the Wrinkles out of the two metal against the top and bottom faces of the form.

5. A metal Working machine comprising a base, a bending device carried by said base, a smoothing device carried by the base, said devices being arranged in spaced relation, a table rotatably mounted on thebase intermediate said form on the table for receiving an of metal, means associated with the form for clamping the angular strip metal thereagainst, said table being movable to place said form in cooperative relation with either device for a forming operation on the strip of metal held thereon, and anchor means securing said table to said base When the form is in a cooperative position with either device.

6. A metal Working machine comprising a bending device movable in a curved path, a smoothing device having a pair of spaced rollers, a shiftable table, a form i'ied on said table for receiving a straight length of channel shaped metal, said form having a straight portion over which the channel shaped metal ts and a curved portion over which a portion of the metal strip is to be bent, means for clamping the length of metal against the straight portion of said form, said bending device cooperating with the form to bend the clamped metal around the curved portion of the form, of said smoothing device cooperating form to press the of said metal bottom faces of the form, and clamp means for bent portion of the strip against the form during the smoothing operation.

'7. In a metal Working machine, the combination with means for supporting and shifting work from one station to another station, of a device movable at one station to cooperate with said means for bending Work carried thereon, device at the other station movable in cooperative relation with said means for pressing Wrinkies from the bent work.

8. lin a metal working machine, the combination with movable means for supporting and shifting work from one station to another station, of a device at one station adapted to cooperate with said means for bending Work carried thereon, and a device reciprocable at the other station in cooperative relation with said means ior removing Wrinkles from the bent work.

9. In a metal Working machine, the combination with movable means for supporting and shifting work from one station to another station, of a device swingable at one station to cooperate vvith said means Work carried thereon, and a device movable at the other station to cooperate with said means for removing Wrinkles from the bent Work.

JOI-IN M. CHRISTMAN. 

